I think that all the bosses needs 30% knockback resistance cause there can be some sentry nests that's not even possible to reach due to high knockback. Like if you are Merasmus on vsh_dunes_b2, it's almost impossible to win cause of the op sentry spots, his high knockback and no sentry stun.

Edit: Munch & Stewie needs like 80% knockback resistance cause of their smaller size which makes much higher knockback
Can't win with Munch without rage because sentries can keep him stuck on wall/corner with an extremly high knockback

Support

I support the resistance for Stewie and Munch,espessially Munch,that knockback is so OP when someone places a good sentry nest,he's 99 % dead,stewie isn't so bad with his bison,he can take them out with a bit skill and luck. I don't think they need 80 % tho.
Well,i don't think we want to make the rest knockback resist. It's making the one of the importantest sentry's function : knockbacking hale from the engi nest more easier to destroy for hales.
The team won't get the important support of dispencers and sentrys(and sometimes teleporters),so i'm not really supporting that idea for all hales.

Such change will happen for some of the bosses, but definitely not all. Knockback is an important aspect of the game and in it's current state it serves it's purpose for most bosses (except the mentioned ones here). Regarding impassable sentry nests, I'll aim for all bosses to have sentry stun on rage and weighdown (something I think should be stock with all bosses, but i guess other hale designers have different ideas about these abilities).

Ye, op bosses like Freddy, Ninjaspy, etc should still be the same, but bosses like Oshawatt, Merasmus etc needs less knockback cause on maps like Dunger, Aperture etc sentry nests makes it almost impossible to win. And I also agree about the bosses without sentry stun and weightdown. With a boss like nyancat on Warebloom and if an engi makes a sentry at the top of the barrels in the corner, it's not possible to win.

Edit: Here is the list of the bosses without sentry stun and weightdown


No sentry stun (not listed the ones who gets uber without sentry stun):

Captain Kinky
Charizard
Merasmus
Fujiwara no Mokou
nyancat
Pyrogas
Sakuya Izayou
The Adminstrator

Bosses who need bigger stun radius and duration:

Cuddly Heavy (Needs to be at melee range and stun is only for 1.5 seconds)
Sandmen (need to be at melee range and stun is only for a half second)
Slenderman (needs to be at melee range which is really hard to reach for a slow boss like him)

No weightdown:

Alien
Alien Queen
Bugs Bunny
Dark Vader
Demo Samedi
Demopan
GentleSpy
Kermit
Pink Panther
Rappy n' Demoman
Robbie the Rabbit
The Administrator
Triceratops
Sanic
Space Marine

Support this.
I practically flew to China as Zer0 after being shot by a single pistol shot.

+1

also gentlespy doesn't have weighdown

Pyrogas has no sentry stun either.

Also creeper has sentry stun but its a very small radius so its useless.

Well, creeper explodes on rage so it doesn't matter that much.

Why not reduce knockback from sentries so that other sources of knockback aren't punished?